#imprescindibl.es

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Studien über fossile spongien

Karl Alfred von Zittel

1877

Género: Fossil Sponges

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New species of fossil sponges from Little Metis, province of Quebec, Canada

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A Middle Devonian octactinellid sponge from New York

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Bibliographic index of North American archaeocyathids

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Annotated bibliography of Lower Paleozoic sponges of North America

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A monograph of the British fossil sponges

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Ordovician sphinctozoan sponges from the eastern Klamath Mountains, northern California

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